gcp_project_id = attribute(:gcp_project_id, default: '<%= external_attribute(pwd, 'gcp_project_id') -%>', description: 'The GCP project identifier.')
gcp_location = attribute(:gcp_location, default: '<%= external_attribute(pwd, 'gcp_location') -%>', description: 'The GCP project region.')
gcp_ext_vm_name = attribute(:gcp_ext_vm_name, default: '<%= external_attribute(pwd, 'gcp_ext_vm_name') -%>', description: 'The name of a VM instance.')
target_pool = attribute('target_pool', default: <%= JSON.pretty_generate(grab_attributes(pwd)['target_pool']) -%>, description: 'Target pool definition')
gcp_zone = attribute(:gcp_zone, default: '<%= external_attribute(pwd, 'gcp_zone') -%>', description: 'The GCP zone.')